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TAPERED HUB KEY

Publishing Venue

Xerox Disclosure Journal

Abstract

A driven wedge and tapered D shaft mounting system is provided for removably mounting a hub to a shaft to transmit torque, such as in a pulley or gear. Shaft 10 for supporting hub member 12 is provided with a shaft end 14 prepared with a "D" -shaped cross section. A flat portion 16 of prepared shaft end 14 is provided at a small angle with respect to the axis A of shaft 10. In practice, flat portion 16 may be arranged at an angle of approximately 2" from the axis. Hub 12 is provided with a fully round, close tolerance shaft opening 18 for connection to shaft 10. To firmly connect the shaft and hub combination, a tapered hub key member 20 is driven into the gap formed by the D-shaped cross-section portion of shaft end 14 and the hub shaft opening 18 to form a wedge providing a tight frictional fit between the shaft end and the hub. Hub key member 20 is generally provided with a wedge end 22 having a cross section complementary to shaft end 14, and a driving portion 24, generally corresponding in cross sectional size and shape to the shaft 10. Driving portion 24 permits a driver to engage with the hub key member for the force fit with the shaft and hub combination. The small taper or locking angle of shaft end 14 and hub key member 20, by elastic deformation, causes a very high normal loading on flat portion 16 of shaft end 14 and hub 12 to provide a high frictional resistance to relative rotational and axial movement of the hub and shaft combination with respect to each another.

Country

Undisclosed

Language

English (United States)

This text was extracted from a PDF file.

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
62% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

TAPERED HUB KEY

Victor Shur

'

'

14 14 FIG. 1

10

FIG. 2

d

22

Volume 12 Number 6 November/December 1987 30 1

[This page contains 1 picture or other non-text object]

Page 2 of 2

TAPERED HUB KEY (Cont'd)

A driven wedge and tapered D shaft mounting system is provided for removably mounting a hub to a shaft to transmit torque, such as in a pulley or gear.

Shaft 10 for supporting hub member 12 is provided with a shaft end 14 prepared with a "D" -shaped cross section. A flat portion 16 of prepared shaft end 14 is provided at a small angle with respect to the axis A of shaft 10. In practice, flat portion 16 may be arranged at an angle of approximately 2" from the axis. Hub 12 is provided with a fully round, close tolerance shaft opening 18 for connection to shaft 10. To firmly connect the shaft and hub combination, a tapered hub key member 20 is driven into the gap formed by the D-shaped cross-section portion of shaft end 14 and the hub shaft opening 18 to form a wedge providing a tight frictional fit between the shaft end and the hub. Hub key member 20 is generally provided with a wedge end 22 having a cross section complementary to shaft end 14, and a driving portion 24, generally corresponding in cross sectional size and shape to the shaft 10. Driving portion 24 permits a driver to engage with the hub key member for the force fit with the shaft and hub combination. The small taper or locking angle of shaft end 14 and hub key member 20, by elast...